Passive mixer with powered preamp?

[VanZea]

I'm a musician (keys) and I'm trying to streamline my setup. On stage I use three stereo devices (2xsynth, 1x sampler). All those devices have a volume knop, so on my current mixer (a very small Behringer) I don't use the channel-volume knobs.

I once made a passive mixer consisting of a few resistors which works great, but weakens the signal going to the PA and my monitor.

Can anybody point my to a diy preamp kit (with only a volume control) I can use with my passive mixer? Battery powered (9V) would be great. Could I use 2 of those parallel (on for my monitor, and on for the PA) on the same signal? I need to be able to adjust the signal going to my monitor independent of the signal going to the PA.

Any other suggestions to minimalize my setup?

 

[PeteMcK]

Project 129

 

[VanZea]

Thanks,

This is exactly what I was looking for. Are there any kits available somewhere for the amp-part of the device?

 

[VanZea]

I now see I can also order the board at the provided link. Thanks again, all my questions are answered.

 

[Nico Ras]

Keep in mind that setting one control does affect the other inputs. It is much better to use a buffer on each control.